Data obtained from two surveys conducted in the winters of 1966 and 1987 show that, for the study area, centred on the town of Murrundi in the Upper Hunter Valley of New South Wales, non-sex.based commercial shooting of the Eastern Grey Kangaroo Macropus giganteus did not greatly alter population argon age and sex structure compared with populations that were ether non-commercially- shot or were protected from shooting It was found, however that shooting In general (whether commercial or non-commercial) decreased the presence of large pouch-young thus delaying the reproductive activity of a population compared to those protected from shooting.

Comparative shooting intensity was more important in its effect on local populations than the type of shooting that was conducted. Populations which experienced high shooting intensities (10% and above shot/year) tended to have **** adult females than those populations undergoing moderate (5-10% shot/year) and low (0-5% shot/year) shooting intensities. There was no significant alteration in proportion of young (out-of-pouch) age classes with changes in shooting intensity. However the proportion of pouch-young significantly decreased with increases in shooting intensity from low to moderate levels. Data suggest that shooting intensity levels at more man 5% of a population per year markedly delay the reproductive activity of local populations.

Eastern Grey Kangaroo, Shooting regime, Age and sex structure, Shooting intensity
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